Why PLC replaced Relay logic conventional control in the Industry? Give its reasons.
[3 marks]List the programming languages used for PLC. How it will differ than embedded controller languages? Explain it in brief.
[4 marks]Draw Functional block diagram of PLC and describe each block in details
[7 marks]What the benefits are of fixed I/O’s and modular I/O’s?
[3 marks]List the name of PLC modules. Justify the need of communication from PC as programming tool? Explain it technically. modules for PLC Operation.
[4 marks]Draw and give details of symbols used to prepare Ladder Logic Diagram (LLD)
[7 marks]Draw the symbols of input and output devices which will be connected with PLC for control application..
[7 marks]Draw and describe rack/slot based addressing format for Input/output devices of the PLC.
[3 marks]Implement PID module to PLC with neat diagram.
[4 marks]Prepare Ladder Logic Diagram (LLD) for latching of Motor start scheme.
[7 marks]How many timers instruction for PLC operation?. Describe TON timer with suitable example
[3 marks]Explain ADD, SUB, MUL and DIV instruction
[4 marks]Develop Ladder logic diagram for each of the following Boolean expressions using AND, OR, and NOT gates:
[7 marks]Y= AB +C D
[ marks]Y= A + CD
Draw and describe PLC Input Module layout
[3 marks]Draw and design LLD to generate wave from with 30% duty cycle at digital output terminal when toggle switch is ON. Take output frequency generated by assigning TIMER as 7 sec On time and 3 sec OFF timer
[4 marks]Prepare LLD to control Traffic light towards only North direction by Turning ON green Lamp for 15 sec, Next turning ON yellow Lamp for sec, and finally turning ON Red Lamp for 120 sec. Repeat it continuously
[5 marks]The counter instructions of PLCs are normally retentive. Explain what this means.
[3 marks]Differentiate UP counter versus DOWN Counter1
[4 marks]Develop LLD conveyor belt system 1). Product in position (limit switch LS1 contacts close). 2). The start button is pressed and the conveyor motor starts to move the product forward toward position A (limit switch LS1 contacts open when the actuating arm returns to its normal position) 3). The conveyor moves the product forward to position Aand stops (position detected by 8 off to-on output pulses from the encoder, which are counted by an up-counter). 4). Atime delay of 10 s occurs, after which the conveyor starts to move the product to limit switch LS2 and stops (LS2 contacts close when the actuating arm is hit by the product).
How will Jump and subroutine instruction applicable in PLC programming? Discuss in brief.
[3 marks]Prepare LLD for COMPARE PLC Function Alight to be turned on if a plc counter has value 0r 40 or 75.
[4 marks]Prepare LLD for following Drilling process system. Drill motor turns on only if there is a part present Operator has one hand on each of the switches to move down (Switch-1) and Up (Switch-2).
[7 marks]Enlist data handling Function. Describe for data move and rotate instructions.
[3 marks]Describe with ladder diagram, FIFO FAL ONS SWEEP
[4 marks]Prepare LLD for following. A FAN is to be STARTed and STOPed from any one of the three location. Each location has a START and STOP Button.2
[7 marks]Y= ( A+ B ) (C +D)
[ marks]